Posted by **Anonymous** on Tuesday, September 17, 2013 at 11:22pm.

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).

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March 24, 2017
Posted by **Anonymous** on Tuesday, September 17, 2013 at 11:22pm.

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).

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